<template>
  <div class="swiper-container" ref="swiper">
    <div class="swiper-wrapper" >
      <div class="swiper-slide" v-for="(slider,index) in skuImageList" :key="slider.id">
        <img :src="slider.imgUrl" :class="{active:curIndex == index}" @click="changeCurIndex(index)">
      </div>
    </div>
    <div class="swiper-button-next" ></div>
    <div class="swiper-button-prev"></div>
  </div>
</template>

<script>

  import Swiper from 'swiper'
  export default {
    name: "ImageList",
    props:['skuImageList'],
    data(){
      return{
        curIndex:0
      }
    },
    methods:{
      changeCurIndex(index){
        // 修改轮播图片的索引
        this.curIndex =index
        // 通知兄弟组件，当前索引值为几
        this.$bus.$emit('getIndex',this.curIndex)
      },
    },
    watch:{
      skuImageList(newValue,oldValue){
        this.$nextTick(()=> {
          new Swiper (this.$refs.swiper, { 
          // 如果需要前进后退按钮
          navigation: {
            nextEl: '.swiper-button-next',
            prevEl: '.swiper-button-prev',
          },
          //  切几张图片
          slidesPerGroup: 1,
          // 显示几张图片
          slidesPerView: 3
      })
        })
      }
    }
  }
</script>

<style lang="less" scoped>
  .swiper-container {
    height: 56px;
    width: 412px;
    box-sizing: border-box;
    padding: 0 12px;

    .swiper-slide {
      width: 56px;
      height: 56px;

      img {
        width: 100%;
        height: 100%;
        border: 1px solid #ccc;
        padding: 2px;
        width: 50px;
        height: 50px;
        display: block;

        &.active {
          border: 2px solid #f60;
          padding: 1px;
        }

       
      }
    }

    .swiper-button-next {
      left: auto;
      right: 0;
    }

    .swiper-button-prev {
      left: 0;
      right: auto;
    }

    .swiper-button-next,
    .swiper-button-prev {
      box-sizing: border-box;
      width: 12px;
      height: 56px;
      background: rgb(235, 235, 235);
      border: 1px solid rgb(204, 204, 204);
      top: 0;
      margin-top: 0;
      &::after {
        font-size: 12px;
      }
    }
  }
</style>